Your step-mother has been bugging you to help her with this new workout routine for weeks. She says her trainer swears by it, that it's totally legit, but knowing your step-mother, you're sure its some new fad plan. Nevertheless, you decide to be a good step-son and help her out. When you show up, she starts to take off her shoes, then her socks. You ask her what the training entails and, seeming almost annoyed, she explains that the workout routine is "natural," and as such, she can't have clothes constraining her form. That can't mean what you think it means, right? But, you watch, stunned, as your step-mother gets totally naked, and insists that you do, too! Reluctantly, you peel off your clothes, watching your step-mother "stretch out" suggestively, completely naked. What is going on? But she's all serious, totally business-like, as she tells you to lay down on her yoga mat so that she can do her "squat variations." She has you lay prone, with your now-raging boner sticking straight up, and she squats over you. You can't believe whats happening! She's squatting right onto your dick! Counting the reps, she gets deeper and deeper, at first just grazing your dick with her pussy, but eventually sinking onto your cock - and acting like its totally and completely normal! She finishes up her sets, all while you try your hardest not to cum inside your step-mother's pussy. What is going on?! Next, she moves to sit ups, having you stand over her so that every time she completes a rep, her mouth is on your cock. This can't be for real? She can't possibly think this is exercise, can she? But if she thinks otherwise, she doesn't let on, sinking her mouth onto your cock over and over, until she's satisfied and its time to move on to push ups. You have to admit, her form is admirable, but its hard to focus on it too much, as she does her "deepthroat pushups," gagging herself on your cock with each descent. You're still trying with all your might not to cum, although you'd love to flood your step-mother's mouth with a sticky mess, mid rep! Her final exercise is a "bicep workout," which turns out to be her alternating pumping her right and left fist up and down your cock. You can't believe she's so naive! This must be what her trainer has been doing with her...and you can't blame him. Your step-mother is sexy, and watching her work you over with such intensity is getting to be too much. You don't want to cum, but her working fist doesn't give you much choice. You groan as you let go a huge load onto her tits and face, coating her with the contents of your balls - a sizeable wad, considering how she's been working you out!! Affronted, she insists that such an outcome was the last thing she expected. You just hope she sees enough results to keep with the program!